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标题: help!!!!!!!!!!!!! [打印本页]

作者: mpy 时间: 2003-3-22 01:00 标题: help!!!!!!!!!!!!!

I am having trouble with the following problem:

Given a triangle with angles A, B, C and sides a, b, c.
A = 45 degrees
B = 60 degrees
a = 10 (this side is opposite angle A)

find b (the side opposite angle B)

The hint I have says the following:
a/sinA = b/sinB = c/sinC = 2R --> X/sin60=10/sin45

But I'm not sure what that means. I would greatly appreciate if anybody could please explain. Thanks!

作者: tongxun 时间: 2003-3-22 14:38

上面写的是三角形面积的计算公式（三角函数的）

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